Weird Clip from Shajarian,Kalhor,Vosoughi and Kiarostami

Kayhan Kalhor , also Romanized as Keyhan Kalhor and Keyhān Kalhor) (born 24 November, 1963 in Kermanshah, Iran) is an Iranian Kamancheh player, composer and master of classical Kurdish and Iranian traditional music.
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Mohammad-Reza Shajarian; (born 23 September 1940) is an internationally and critically acclaimed Persian classical singer, composer and Ostad (master) of Persian music. He has been called "Iran's greatest living maestro of Persian classical music."Shajarian is also known for his skills in Persian calligraphy, and humanitarian activities.